Gardening: mark  http/tests/fetch/window/stream-reader.html as flaky on Windows.

BUG=477252
[email protected]
NOTRY=true
NOPRESUBMIT=true

Review URL: https://codereview.chromium.org/1083263002

git-svn-id: svn://svn.chromium.org/blink/trunk@193764 bbb929c8-8fbe-4397-9dbb-9b2b20218538
diff --git a/third_party/WebKit/LayoutTests/TestExpectations b/third_party/WebKit/LayoutTests/TestExpectations
index 8190ef9..64e5f27 100644
--- a/third_party/WebKit/LayoutTests/TestExpectations
+++ b/third_party/WebKit/LayoutTests/TestExpectations
@@ -2099,3 +2099,5 @@
 
 crbug.com/477244 inspector-protocol/debugger/debugger-setVariableValue.html [ Crash ]
 crbug.com/477244 inspector/sources/debugger/live-edit-breakpoints.html [ Crash ]
+
+crbug.com/477252 [ Win ] http/tests/fetch/window/stream-reader.html [ Pass Timeout ]